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' B. BERNSTEIN,

PROPELLING APPARATUS. r

. N0.'528,138 r Patented Oct. 30, 1894.

I gafd WITNESSES:

ATTORNEYS.

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NlTED STATES PATENT OFFICE.

BENNY BERNSTEIN, OF NEW YORK, N. Y.

PROPELLING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 528,138, datedOctober30, 1894..

Application filed December 22, 1893. Serial Nat -94,448. (No model.)

To all whom it may concern.-

Be it known that I, BENNY BERNSTEIN, a citizen of the United States, anda resident of the city of New York, county and State of New York, haveinvented certain new and useful Improvements in Propelling Apparatus, ofwhich the following is a specification.

This invention relates to actuating devices for screw propellers,ventilating fans or wheels, blowers, boring tools, the platens ofprinting presses and other articles or ma chines requiring a similarmotion. Its object is to provide a simple and readily operated devicewhereby the blades or cutters of such propellers or tools may be causedto recip the direction of rotation of the driving shaft,

so that the blades or cutters may have a screw-like course and exert athrust or push continuously upon or against the medium or matter inwhich they are rotated.

The invention is illustrated in the accompanying drawings, forming partof this specification, like letters of reference designating 3corresponding parts in all the views.

Figure 1 is a sectional side elevation of the apparatus applied toactuate a propeller for vessels, the sectional view of the recess in thehub being takenupon a line corresponding to z--z in Fig. 3 in theinterest of clear- .ness. Fig. 2 is a vertical transverse section of thesame on theline :r-w. Fig. 3 is a similar section on the line yy. Fig. 4is a perspective view of a portion of the sleeve-bearing upon the shaft.Fig. 5 is a plan view of part of the hub surrounding the shaft andsleevebearing, and Fig. 6 is a perspective of the end of the said shaft.

The driving shaft A is journaled near the stern of the vessel in anysuitable support, such as a, to which is affixed by screws or bolts thebase flange b of the circular sleeve bearing 1). At the extreme end ofthe driving shaft A which revolves in these bearings is a key or spider0.

Upon the bearing bis imposed a circular hub (1 preferably made in twoparts, the rearward one being formed integrally with the ried by thehearing I).

together.

shaft d which is journaled at d in the wall B of the vessels stern. Therearward half of the hub is provided with a longitudinal slot or recesseregistering withthe spider c and within which the said spider fits.

The forward part of the hub d is formed] on its inner side with a doublecam groove f; thatis, a groove in the shape ofa figure 8, as best shownin Fig. 5, this groove beingadapted to receive a guide g' seated upon apin g car- The two parts of the hub are securely bolted Upon that partof the shaft (1 which is outside the wall of the. vessel is affixed thescrew-propeller 0 having a plurality of blades: 0' of any desired shapeand style. r 1

It will be understood that the driving shaft A is connected with asource of power whereby the said shaft is rotated. I have, how- 1 ever,not shown such mechanism as this forms no part of my invention and anyof the ordinary and well known means to the desired. end may be adopted,it being obvious that" the selection is dependent upon the situation ofthe propelling apparatus and the direction; 1

in which it is to be utilized. V

The operation of the device will be readily apparent from theaccompanying drawings,

1 representing thepropelling apparatus applied to a vessel. As thedriving shaftb is-rotated,

the spider 0 upon the end thereof, engaging with the hub 01, causes thesaid hub and the shaft (1 carrying the propeller-blades to rotate in thesame direction. As the hub rotates, the guide 9 on the bearing 1)travels in the cam groove in the hub, passing from one loop of thegroove to the other, so that the hub as it rotates travels backward andfor- Ward, the spider 0 being alternately at the and to the shaft (1that as the driving shaft is continuously rotated in one direction theblades upon the rearward movement of the hub exert their push in arotary and 0bliquely outward direction upon or against the water and onthe forward movement of thrust or push in a rotary and obliquely outwarddirection. As a result the vessel moves steadily forward. The directionof rotation of the driving shaft being reversed a corresponding reversalof the direction of rotation of the hub and blades follows, the thrustor push of the blades being consequently exerted in a direction exactlyopposite to that previously taken, thus causing the vessel to be carriedbackward.

It is to be particularly understood that it is the direction of rotationand pitch of the blades in connection with the reciprocatory movement ofthe shaft upon which they are, that determines the direction in whichthe blades exert their push or thrust and thus so long as the drivingshaft is rotated in the one direction the vessel is driven forward, andwhen rotated in the opposite direction the vessel is carried backward,the hub and blades in each instance rotating continuously andsimultaneously in the same direction as the shaft. The bearing b beingstationary the travel of the guide in the cam groove of the hub isuniform and the rotation and reciprocation of the hub is steady andregular. The junction of the two branches of the cam groove moreover,being a gradual one, the motion of the hub and blades is smooth andeven, without jar or intermission.

While I have illustrated this propelling apparatus only as applied tovessels it will be manifest that I do not confine myself to its use inthis connection alone, as the device may be equally well employed forany purpose Where a rotary and reciprocatory motion is the desideratum.

I do not claim broadly the principle of producing the rotary andreciprocatory motion of the propeller through the agency of the swiveledguide and the figure 8-shaped groove in the hub, this being covered byLetters PatentNo. 511,990, granted to me January 2, 1894:, and mypresent invention has particular reference to certain new and usefulimprove ments whereby it is possible to locate the entire apparatus,except the propeller within the vessel.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, isv I 1. A propelling apparatusconsisting of a bearing sleeve secured to a fixed support, a guideattached thereto, a hub rotatable and reciprocable upon the bearingsleeve and formed with an internal figure 8-shaped camgroove adapted toreceive the guide carried by the bearing sleeve, a shaft extendingrearwardly from the hub through the wall of the vessel and carrying thepropeller blades, and

means for connecting the said hub with a driving shaft, in such manneras to permit of reciprocatory motion thereof, the said bearing sleeveand the hub thereon being located within the body of the vesselsubstantially as shown and described.

2. A propelling apparatus consisting of a bearing sleeve secured to afixed support, a guide attached thereto, a hub rotatable andreciprocable upon the bearing sleeve and formed with an internal figure8-shaped camgroove adapted to receive the guide carried by the bearingsleeve, a longitudinal recess in the said hub, a shaft extendingrearwardly therefrom through the wall of the vessel, and

carrying the propeller blades and a driving shaft journaled in the saidbearing sleeve and provided at the end with a spider adapted to registerwith the recess in the hub, the said bearing sleeve and the hub thereonbeing located within the body of the vessel substantially as shown anddescribed.

3. A propelling apparatus consisting of a bearing sleeve rigidly securedto a fixed sup port, a segmental guide swiveled to the said bearingsleeve, a hub rotatable and reciprocable upon the bearing sleeve, thesaid hub being formed in two portions bolted together, the forward beingformed with an internal figure 8-shaped cam-groove, adapted to receivethe guide carried by the bearing sleeve, the rearward part of the hubbeing provided with a longitudinal recess, a shaft extending from thesaid hub through the wall of the vessel and carrying the propellerblades, a driving shaft journaled in the fixed support and in thebearing sleeve, and provided at its end with a spider adapted toregister with and work within, the longitudinal recess in the rearwardpart of the hub, the said bearing sleeve and the hub thereon beinglocated within the body of the vessel substantially as shown anddescribed.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 19th day of December, 1893.

' BENNY BERNSTEIN. Witnesses:

PERCY T. GRIFFITH, O. GERST.

